Function addressing method for unified diagnosis service of automobile Ethernet

Abstract

The invention discloses a UDS function addressing method based on an automobile Ethernet, and the method comprises the following steps: carrying out the mapping of a function addressing address and anIP multicast address, building a mapping table, and enabling the mapping table to be built in a node which is used for an Ethernet diagnosis function; according to the mapping table, completing the control of the server on the access permission of the external test equipment; sending the diagnosis communication of the functional addressing communication mode to a server; and after the server receives the function addressing diagnosis message, carrying out diagnosis processing. By adopting the technical scheme provided by the invention, the client only needs to process and send one data packetonce when processing function addressing and sending, and the processing time of the external test equipment, the overall communication time and the occupation of the system bandwidth are well improved.

Description

Technical field [0001] The present invention belongs to the diagnostic communication field of automotive Ethernet, in particular to a UDS (Unified Diagnostic Service) functional addressing method based on automotive Ethernet. Background technique [0002] In the automotive Ethernet technology, the diagnostic high-level data (UDS) is carried on the DoIP (Diagnostic Communication over Internet Protocol). Specifically, it is carried on the diagnostic data packet with the load type 0x8001 in the DoIP protocol. In the current version of the DoIP protocol, it is clearly pointed out that the 0x8001 diagnostic message is carried on the TCP (Transmission Control Protocol). That is to say, DoIP-based diagnostic communication only has the capability of point-to-point communication. [0003] The diagnostic communication actually supports two communication modes, namely physical addressing and functional addressing. Physical addressing is point-to-point communication, and functional addressi...

AI Technical Summary

Problems solved by technology

However, the current automotive Ethernet technology is still in the initial stage of development. The process of combining Ethernet technology with the original diagnostic communication requirements is very clumsy in the realization of function addressing.

Replacing one-to-many communication with multiple single-point communication increases the software processing complexity of the diagnostic communication initiator, and with the increase of functional addressing objects, the data packets that need to be sent for a single functional addressing communication also increase. As it increases, the processing time of the response and the bus bandwidth are wasted needlessly

However, simply using Ethernet multicast / broadcast directly to transmit function-addressed messages is only for automotive diagnostic services, which is not safe enough

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